<table class="table1 hd-form">
			
	<tr>
		<th class="w100">属性值</th>
		<td>
			<ul id="dropdown">
				<li><input type="text" name="attr_value[]" id=""> <input type="button"  class="btn1" value="增加(+)" onclick="add()"></li>
			</ul>
			
		</td>
	</tr>
</table>
<script type="text/javascript">
	function add(){
		var html = '<li><input type="text" name="attr_value[]" id=""> <input type="button" class="btn2" onclick="del(this)" value="删除"/>';
		$('#dropdown').append(html);
	}
	function del(obj){
		$(obj).parent().remove();
	}
</script>	